Program to print the Fibonacci Half Pyramid Pattern

1 

1 2 

3 5 8 

13 21 34 55 

89 144 233 377 610 

Problem statement:- Program to print the Fibonacci Half Pyramid Pattern.

 Data requirement:-

  Input Data:- row_size

  Output Data:- c

  Additional Data:-out, in or inn(for python), a, b

Program in C

Here is the source code of the C Program to print the Fibonacci Half Pyramid Pattern.

Code:

#include <stdio.h>

int main()

{

    int out, in, a = 0, b = 1, c = a + b;

    printf("Enter the row size:");

    int row_size;

    scanf("%d", &row_size);

    for (out = 1; out <= row_size; out++)

    {

        for (in = 1; in <= out; in++)

        {

            printf("%d ", c);

            c = a + b;

            a = b;

            b = c;

        }

        printf("\n");

    }

}

Input/Output:

Enter the row size:5

1

1 2

3 5 8

13 21 34 55

89 144 233 377 610

Program in C++

Here is the source code of the C++ Program to print the Fibonacci Half Pyramid Pattern.

Code:

#include <iostream>

using namespace std;

int main()

{

    int out, in, a = 0, b = 1, c = a + b;

    cout << "Enter the row size :";

    int row_size;

    cin >> row_size;

    for (out = 1; out <= row_size; out++)

    {

        for (in = 1; in <= out; in++)

        {

            cout << c << " ";

           

            c = a + b;

            a = b;

            b = c;

        }

        cout << "\n";

    }

}

Input/Output:

Enter the row size:4

1

1 2

3 5 8

13 21 34 55

Program in Java

Here is the source code of the Java Program to print the Fibonacci Half Pyramid Pattern.

Code:

import java.util.Scanner;

public class FibonacciHalfPyramidPattern {

    public static void main(String[] args) {

        Scanner cs = new Scanner(System.in);

        System.out.println("Enter the row size:");

        int out, in, a = 0, b = 1, c = a + b;

        int row_size = cs.nextInt();

        for (out = 1; out <= row_size; out++) {

            for (in = 1; in <= out; in++) {

                System.out.print(c + " ");

                c = a + b;

                a = b;

                b = c;

            }

            System.out.println();

        }

        cs.close();

    }

}

Input/Output:

Enter the row size:

5

1 

1 2 

3 5 8 

13 21 34 55 

89 144 233 377 610 

Program in Python

Here is the source code of the Python Program to print the Fibonacci Half Pyramid Pattern.

Code:

row_size = int(input("Enter the row size: "))
a = 0
b = 1
c = a+b
for out in range(1, row_size+1):
       for inn in range(1, out+1):
            print(c, end=" ")

            c = a+b
            a = b
            b = c
        print("\r")

Input/Output:

Enter the row size:3

1 

1 2 

3 5 8 

More:-

C/C++/Java/Python Practice Question